<!doctype html>
<html lang="zh-cn">
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
  <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>叉子</title>
</head>
<style>
  body,
  html {
    width: 100%;
    height: 100%;
    background: #000;
    display: flex;
  }

  div {
    position: relative;
    width: 140px;
    height: 140px;
    margin: auto;
    border-radius: 50%;
    background: #fff;
  }
  div::before {
    content: "";
    position: absolute;
    width: 40px;
    height: 200px;
    left: 50%;
    top: 100%;
    background: #fff;
    border-radius: 20px;
    transform: translate(-50%, -50%);
  }
  div::after {
    content: "";
    position: absolute;
    width: 20px;
    border-radius: 15px;
    height: 100px;
    background: #fff;
    left: 0;
    top: -20px;
    box-shadow: 20px 0 0 0 #000, 40px 0 0 0 #fff, 60px 0 0 0 #000, 80px 0 0 0 #fff, 100px 0 0 0 #000, 120px 0 0 0 #fff;
  }

</style>
<body>
<ul>
  <li>使用多重阴影的特性，完成叉子的头部部分。</li>
</ul>
<div></div>
</body>
</html>
